Replaced iac car wont start if it does turnover

Have you checked base fuel pressure before and after cranking the engine ?

Check for vacuum leak at intake manifold or bad fuel pump relay or have fuel pressure checked to see if fuel pump is working properly 40-45 psi it should be pumping

Take it to Ford and have them run their troubleshooting machine on it.Costs about 70 bucks and sometimes if they do the repair,this cost is removed from the bill. Ask Ford. don-ohio

mostely your IAC Idle Air Controler valve needs cleaning or replacement.
check this here how to remove IAC valve Idle Air Controler valve
hope this helps

check for relay and roll over switch

clean the iac, and then replace it. if its bad. check vacuum lines and run some good injector fluid in tank, maybe the injectors are clogging up. but clean iac first to see if this takes care of problem.

Look for vacuum leaks under the hood and check for IAC error codes on your cars computer.

You have a faulty solinoid on the starter motor have it checked out.

when you hold the accelerator does the vehicle stay running? if so the problem is in ithe IAC idle air control motor, take a small screw driver and using the handle tap the iac motor and usualy the motor will kick in and the vehicle will run fine then if the problem is rectified replace the IAC

iac valve is probably sticking, simply peck on valve to see if problem alleviates - if so replace iac